Implement robustness strings in requestMediaKeySystemAccess().

media/base/eme_constants.h

Index: media/base/eme_constants.h
diff --git a/media/base/eme_constants.h b/media/base/eme_constants.h
index 4462c5cc0b251686c30bb1ef99b5a716248d7710..5acbf1e3c7cfc7ef395bb374603ea5be14c9d0e9 100644
--- a/media/base/eme_constants.h
+++ b/media/base/eme_constants.h
@@ -49,6 +49,11 @@ enum EmeCodec {
 typedef uint32_t SupportedInitDataTypes;
 typedef uint32_t SupportedCodecs;
 
+// Note: The encrypted media permission, referenced in several enums below, is
+// equivalent to access to a distinctive identifier. For Widevine, we assume
+// that it is equivalent to remote attestation succeeding. (Remote attestation

[ddorwin, 2015/03/18 01:08:04]

This only applies to Chrome OS. That should be clear.
Instead, you could just say this is to the best of our knowledge and/or based on
the expected outcome.

[sandersd (OOO until July 31), 2015/03/18 20:41:37]

Done.

+// can fail for other reasons, but those reasons are not yet considered.)
+
 enum EmeSessionTypeSupport {
   // Invalid default value.
   EME_SESSION_TYPE_INVALID,
@@ -60,6 +65,7 @@ enum EmeSessionTypeSupport {
   EME_SESSION_TYPE_SUPPORTED,
 };
 
+// Used to declare support for distinctive identifier and persistent state.
 enum EmeFeatureSupport {
   // Invalid default value.
   EME_FEATURE_INVALID,
@@ -74,12 +80,48 @@ enum EmeFeatureSupport {
   EME_FEATURE_ALWAYS_ENABLED,
 };
 
+// Used to query support for distinctive identifier and persistent state.
 enum EmeFeatureRequirement {
   EME_FEATURE_NOT_ALLOWED,
   EME_FEATURE_OPTIONAL,
   EME_FEATURE_REQUIRED,
 };
 
+enum class EmeMediaType {
+  AUDIO,
+  VIDEO,
+};
+
+// Robustness values understood by KeySystems. Each value imples all those
+// before it. (This may need to be redesigned to support non-Widevine CDMs.)
+enum class EmeRobustness {
+  INVALID,
+  EMPTY,
+  SW_SECURE_CRYPTO,
+  SW_SECURE_DECODE,
+  HW_SECURE_CRYPTO,
+  HW_SECURE_DECODE,
+  HW_SECURE_ALL,
+};
+
+// Configuration rules indicate the configuration state required to support a
+// configuration option (note: a configuration option may be disallowing a
+// feature). Configuration rules are used to answer queries about distinctive
+// identifier, persistent state, and robustness requirements, as well as to
+// describe support for different session types.
+enum class EmeConfigRule {
+  // The configuration option is not supported.
+  NOT_SUPPORTED,
+  // The configuration option is supported if the encrypted media permission is
+  // granted.
+  PERMISSION_REQUIRED,
+  // The configuration option is supported, but the user experience may be
+  // improved if the encrypted media permission is granted.
+  PERMISSION_RECOMMENDED,
+  // The configuration option is supported without conditions.
+  SUPPORTED,
+};
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_EME_CONSTANTS_H_